What prevents us from modifying getaddrinfo to set an appropriate
error code when kernel doesn't support particuler address family and
removing the hack done in inetd.c of rev. 1.60?

Due to this, our current inetd complains as follows when service name
is not found in /etc/service (try to remove ftp from /etc/service and
send HUP to inetd).  The old error message was a bit friendly than
this in this case.

Jul  4 12:17:32 page-fault inetd[212]: ftp/tcp: *: the address family is not supported by the kernel

enami.